package com.ming.reggie.service.imp;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.ming.reggie.dao.DishMapper;
import com.ming.reggie.dto.DishDto;
import com.ming.reggie.pojo.Dish;
import com.ming.reggie.pojo.DishFlavor;
import com.ming.reggie.service.DishFlavorService;
import com.ming.reggie.service.DishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
public class DishServiceImp extends ServiceImpl<DishMapper,Dish> implements DishService {

    @Autowired
    private DishFlavorService dishFlavorService;

    @Override
    @Transactional
    public void saveWithFlavor(DishDto dishDto) {
        //保存菜品的基本信息到菜品表dish
        this.save(dishDto);

        //获取菜品ID
        Long dishId = dishDto.getId();
        //菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors=flavors.stream().map((item)->{
            item.setDishId(dishId);
            return item;
        }).collect(Collectors.toList());

        //保存菜品口味的基本信息到菜品表dish——flavor
        dishFlavorService.saveBatch(flavors);

    }

    //根据id查询菜品信息和对应的口味信息
    public DishDto getByIdWithFlavor(Long id) {
//        查询菜品信息
        Dish dish =this.getById(id);

        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish,dishDto);

//        对应的口味信息
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dish.getId());
        List<DishFlavor> flavors = dishFlavorService.list(queryWrapper);
        dishDto.setFlavors(flavors);

        return dishDto;
    }

//    修改菜品
    @Transactional
    public void updateWithFlavor(DishDto dishDto) {
        //更新dish表基本信息
        this. updateById (dishDto) ;

//清理当前菜品对应口味数据--dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper() ;
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());
        dishFlavorService.remove(queryWrapper) ;

//添加当前提交过来的口味数据---dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto. getFlavors() ;

        flavors = flavors. stream().map((item) -> {
            item.setDishId(dishDto.getId());
            return item;
        }).collect (Collectors.toList());

        dishFlavorService.saveBatch(flavors) ;
    }
}
